As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - THERE WAS A LOOP -A- FAULT LIGHT ILLUMINATED ON NR 1 ENGINE FIRE DETECTION SYSTEM. FOUND NR 1 ENGINE FIRE LOOP -A- CIRCUIT BREAKER NOT SET. RESET CIRCUIT BREAKER. C/W FIRE/OVERHEAT DETECTION SYSTEM ADJUST/TEST. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.